The HVAC industry is a worldwide enterprise, with roles including operation and maintenance, system design and construction, equipment manufacturing and sales, and in education and research. The HVAC industry was historically regulated by the manufacturers of HVAC equipment, but regulating and standards organizations such as HARDI, ASHRAE, SMACNA, ACCA, Uniform Mechanical Code, International Mechanical Code, and AMCA have been established to support the industry and encourage high standards and achievement.
We are service professionals! As licensed contractors and specialists in the field of heating and air conditioning, we have the tools, the equipment, and the experience to keep your equipment running smoothly all year long. If it is emergency service that you need, we are available to assist you! To help reduce service emergencies, we offer service agreements to keep your comfort system running at peak performance.
The myth that most people believe is that if you add more refrigerant to the unit it will cool better. This is only true if the evaporator coil is operating below freezing. The unit must have a balanced charge at the correct refrigerant pressure for the temperature and usually, only an HVAC professional can charge your unit properly. Another misconception about refrigerant is that the unit burns it up and it must be replaced from time to time. This is not true. Furthermore, the refrigerant loop is a closed system and barring any leaks the air conditioning system should never need any refrigerant.
Change the filter: A new filter can cost as little as $20. Since this is the most effective way of maintaining your AC system, there is no reason not to change your filter. Homeowners should change your AC filters whenever it gets dirty. Depending on the filter, you may have to change it once every six months or once every month. Each filter should indicate how long it will last.
Clean air delivery rate is the amount of clean air an air cleaner provides to a room or space. When determining CADR, the amount of airflow in a space is taken into account. For example, an air cleaner with a flow rate of 100 cfm (cubic feet per minute) and an efficiency of 50% has a CADR of 50 cfm. Along with CADR, filtration performance is very important when it comes to the air in our indoor environment. Filter performance depends on the size of the particle or fiber, the filter packing density and depth and also the air flow rate.[26]
Air conditioners can create a lot of water because they remove moisture from the air. To get rid of this, they have a [usually plastic] drain pipe that comes out of the side of the air handler. Over time, algae can block this pipe and, when it does, the AC won’t work. In fact, some condensate drains have a float switch that won’t let the AC run if water backs-up. Water can also puddle around the unit or flood the area. To deal with condensate problems, please see Air Conditioner Leaks Water, below.
The HVAC industry has grown a lot since Brennan’s Heating & Air Conditioning opened. Today, high-tech comfort systems require highly-trained technicians who are NATE-certified and experienced in all areas of air conditioning repair, heating, and indoor air quality. After 35+ years, we’ve changed a lot too. At Brennan’s Heating & Air Conditioning, we still provide good, old-fashioned service, but we also offer the full line of cutting-edge products from the heating and cooling experts at Carrier.
We are large enough to service you with prompt service and best prices, but small enough to provide you with that personalized service you deserve. Our offices serve all of Hillsborough, Pinellas, Pasco, Polk, Sarasota, Manatee, Charlotte, Hernando & Citrus counties. Serving Tampa, St Petersburg, Clearwater, Lakeland, Sarasota, Bradenton, Temple Terrace, Brandon, Apollo Beach, Riverview, Valrico, Lithia, Palm Harbor, Plant City, Lutz, Wesley Chapel, Land o Lakes, Port Richey, Spring Hill, and all surrounding areas.
As your trusted HVAC service experts since 1960, Miller's Air Conditioning & Heating was established before Livermore became an official city. We have a long-term commitment to the local community and have built solid relationships across generations of families. Family owned and operated, we recognize the importance of an HVAC provider you can always depend on to serve your best interests. At Miller's Air Conditioning & Heating we uphold exacting standards of quality, from the products we recommend and install, to the integrity of workmanship. By refusing to settle, we provide a greater return from all of our services, including new system installation, replacement, seasonal maintenance, and repair of air conditioners, heat pumps, furnaces, ductless units, and attic fans. Whether you’re a first-time homeowner or dissatisfied with the contractors you’ve tried in the past, we’ll make sure Miller's Air Conditioning & Heating satisfies your every expectation.

According to a 2015 government survey, 87% of the homes in the United States use air conditioning and 65% of those homes have central air conditioning. Most of the homes with central air conditioning have programmable thermostats, but approximately two-thirds of the homes with central air do not use this feature to make their homes more energy efficient.[56]

Did your furnace suddenly stop working? Call Coolray and relax! Our skilled HVAC technicians can repair all makes and models of furnaces, heat pumps and heating equipment. We serve Cumming, GA with 24-hour heating repair service that you can count on when you need it. Our technicians will arrive on time and will be equipped with the tools necessary to correctly diagnose and repair your heating system. Just need routine maintenance on your furnace? We can do that too. Looking for a new system altogether? We're the HVAC contractor Cumming, Georgia residents can count on for all of their home heating needs!

Just like running a marathon, we perform better at full strength. If we’re not feeling great, it’s that much harder to finish the race. Similarly, when you set your thermostat to a certain temperature, the system is tasked with maintaining that temperature throughout the room. Working at full strength, the system can easily maintain that temperature (as long as it’s not below 60 degrees or above 80 degrees). However, when injured, the system may struggle to keep the room at your desired temperature. As such, it’s working harder, which means higher utility bills.

Designed to improve manufacturing process control in a printing plant, Carrier's invention controlled not only temperature but also humidity. Carrier used his knowledge of the heating of objects with steam and reversed the process. Instead of sending air through hot coils, he sent it through cold coils (filled with cold water). The air was cooled, and thereby the amount of moisture in the air could be controlled, which in turn made the humidity in the room controllable. The controlled temperature and humidity helped maintain consistent paper dimensions and ink alignment. Later, Carrier's technology was applied to increase productivity in the workplace, and The Carrier Air Conditioning Company of America was formed to meet rising demand. Over time, air conditioning came to be used to improve comfort in homes and automobiles as well. Residential sales expanded dramatically in the 1950s.[citation needed]

In 1992, a non-governmental organization, Greenpeace, was spurred by corporate executive policies and requested that a European lab find substitute refrigerants. This led to two alternatives, one a blend of propane (R290) and isobutane (R600a), and one of pure isobutane.[18][22] Industry resisted change in Europe until 1993, and in the U.S. until 2011, despite some supportive steps in 2004 and 2008 (see Refrigerant Development above).[27][67]

Also, have an energy-efficiency professional come to your home and perform an energy assessment. This assessment could be either conducting a walk-through of your home with a clipboard or performing a thorough audit, pressurizing your home with a blower-door test to detect energy leaks. You may qualify for state discounts or rebates to have insulation installed in your home. Some utility companies also subsidize the cost of these energy efficiency assessments.
MacDonald-Miller has developed a unique program to help the Service Department continually evaluate the satisfaction of customers and make ongoing improvements to the level of service provided. Our Customer Experience Commitment encompasses the following elements that help maintain and increase the quality of service delivered by the MacMiller team.

If your air ducts have been damaged, you’ll need to replace them. The national average air duct replacement cost is $150-$280, which may not include materials. Factors such as duct material, labor, location of ducts and linear feet of ductwork will all affect your final costs. Labor costs will vary based on how accessible the ducts are and what material your ducts are made of. The least expensive duct material is a flexible, non-metallic ducting that costs approximately $1-$2 per linear foot. Flexible aluminum is generally more expensive and stronger than non-metallic ducting. Stainless steel ducting is the strongest, the least flexible (meaning installing it typically has higher labor rates), and usually the most expensive. An average price for air duct replacement could range between $35 and $55 per linear foot, including basic materials and labor. A typical single-family home has 6-10 duct runs; replacing or installing one duct run could average $150-$250 for labor.

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The use of furnaces, space heaters, and boilers as a method of indoor heating could result in incomplete combustion and the emission of carbon monoxide, nitrogen oxides, formaldehyde, volatile organic compounds, and other combustion byproducts. Incomplete combustion occurs when there is insufficient oxygen; the inputs are fuels containing various contaminants and the outputs are harmful byproducts, most dangerously carbon monoxide, which is a tasteless and odorless gas with serious adverse health effects.[14]
If you start noticing any of these signs above or other “odd” things going on with your HVAC system, contact David LeRoy Plumbing, Inc. to repair or replace your HVAC. We are local experts who provide quality service. We have a team of professional and experienced technicians to help guide you through the decision process and we regularly feature special prices on tune-ups for home heating and cooling equipment.
Ground source, or geothermal, heat pumps are similar to ordinary heat pumps, but instead of transferring heat to or from outside air, they rely on the stable, even temperature of the earth to provide heating and air conditioning. Many regions experience seasonal temperature extremes, which would require large-capacity heating and cooling equipment to heat or cool buildings. For example, a conventional heat pump system used to heat a building in Montana's −70 °F (−57 °C) low temperature or cool a building in the highest temperature ever recorded in the US—134 °F (57 °C) in Death Valley, California, in 1913 would require a large amount of energy due to the extreme difference between inside and outside air temperatures. A few feet below the earth's surface, however, the ground remains at a relatively constant temperature. Utilizing this large source of relatively moderate temperature earth, a heating or cooling system's capacity can often be significantly reduced. Although ground temperatures vary according to latitude, at 6 feet (1.8 m) underground, temperatures generally only range from 45 to 75 °F (7 to 24 °C).
Here’s a simple test to try on your own: When it’s hotter than 80 degrees outside, turn on your AC unit, and set it to well below room temperature. Let it run for 15 minutes, then use a thermometer to check just outside the return duct (the area where air flows in to be cooled). Now take a temperature reading just outside the strongest, most easily accessible vent (where cool air should be flowing out). Subtract the second reading from the first. If the difference between these two is fewer than 14 degrees, your HVAC unit might need work.

Central home air conditioner service systems consist of two major components: a condensing unit that sits outside your house, and the evaporator coil (often referred to as an A-coil) that sits in the plenum of your furnace or air handler. The refrigerant in the A-coil picks up the heat from your home and moves it to the outdoor condensing unit. The condensing unit fan blows outside air through the condensing coil to remove the heat. The condensing unit houses the three parts replaceable by a DIYer: the contactor, the start/run capacitor(s) and the condenser fan motor. The condensing unit also houses the compressor, but only a pro can replace that. The A-coil has no parts that can be serviced by a DIYer.